kotlin - No custom broadcasts are received on an android service - Stack Overflow

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I'm developing some apps for a specific device running Android 11 (API level 30) in kotlin. I have 2 apps that need to communicate with each other and I have thought to do it using custom broadcasts. One of the apps is a service (S) and the other is a GUI app (G). Typically S will send a broadcast and G will receive it to execute some code and respond with another broadcast. I'm able to send broadcasts from S and receive them on G, but I'm not able to send from G and receive them on S. As you can see below I use the same mechanisms in both applications. Do the services have restrictions when receiving broadcasts?

Packages:

• S: company.product.service
• G: company.product.app

Some code from S (abbreviated for simplicity):

ComConstants:

package company.product.service

class MediaConstants
{
    companion object
    {
        const val MY_ACTION = "company.product.MY_ACTION"
        const val MY_ACTION_RESPONSE = "company.product.MY_ACTION_RESPONSE"
    }
}

MainActivity:

package company.product.service

// imports

class MainActivity : AppCompatActivity()
{
    override fun onCreate(savedInstanceState: Bundle?)
    {
        super.onCreate(savedInstanceState)

        val i = Intent(this, MainService::class.java)
        startForegroundService(i)
        finish()
    }
}

MainService:

package company.product.service

// imports

class MainService : Service()
{
    ...
    private var myActionResponseReceiver = MyActionResponseReceiver(this)
    
    override fun onCreate()
    {
        super.onCreate()
        registerReceivers()
    }
    override fun onDestroy()
    {
        super.onDestroy()
        unregisterReceivers()
    }
    
    private fun registerReceivers()
    {
        registerReceiver(myActionResponseReceiver, IntentFilter(MY_ACTION_RESPONSE))
    }
    private fun unregisterReceivers()
    {
        unregisterReceiver(myActionResponseReceiver)
    }

    override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int
    {
        // Some code to receive TCP connections...
        sendBroadcast()
        // More code
    }

    fun sendBroadcast()
    {
        val intent = Intent(MY_ACTION)
        intent.putExtra(/* name and value */)
        sendBroadcast(intent)
    }
}

MyActionResponseReceiver:

package company.product.service.receivers

// imports

class MyActionResponseReceiver(): BroadcastReceiver()
{
    override fun onReceive(context: Context?, intent: Intent?)
    {
        Log.i("MyTag", "Broadcast received: ${intent?.action}")
    }
}

Some code from G (abbreviated for simplicity):

ComConstants:

package company.product.app

class MediaConstants
{
    companion object
    {
        const val MY_ACTION = "company.product.MY_ACTION"
        const val MY_ACTION_RESPONSE = "company.product.MY_ACTION_RESPONSE"
    }
}

MainActivity:

package company.product.app

// imports

class MainActivity : AppCompatActivity()
{
    private var myActionReceiver = MyActionReceiver()

    override fun onCreate(savedInstanceState: Bundle?)
    {
        super.onCreate(savedInstanceState)
        // some view code

        registerReceivers()
    }    
    override fun onDestroy()
    {
        super.onDestroy()
        unregisterReceivers()
    }
    
    private fun registerReceivers()
    {
        registerReceiver(myActionReceiver, IntentFilter(MY_ACTION))
    }
    private fun unregisterReceivers()
    {
        unregisterReceiver(myActionReceiver)
    }
}

MyActionReceiver:

package company.product.app.receivers

class MyActionReceiver(): BroadcastReceiver()
{
    override fun onReceive(context: Context?, intent: Intent?)
    {
        Log.i("MyTag", "Broadcast received: ${intent?.action}")
        // some code
        sendResponseBroadcast()
    }

    fun sendResponseBroadcast()
    {
        val intent = Intent(MY_ACTION_RESPONSE)
        intent.setComponent(ComponentName("company.product.app", "company.product.service/.receivers.MyActionResponseReceiver"))
        intent.putExtra(/* name and value */)
        sendBroadcast(intent)
    }
}

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